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Gene & Protein in Disease Comprehensive analysis of ZNF521/Zfp521

In summary, ZNF521/Zfp521 functions as a stem Previous studies have reported that immunoprecipitation
cell-related transcription cofactor, playing a crucial analysis identified specific interactions within the ZNF521
role in regulating the homeostasis of hematopoietic, protein: zinc finger 1- 8 interact with P300, 6,15,20-22 zinc finger
neural, osteogenic, adipose, and articular chondrocytes. 14 - 19 interact with SMAD, zinc finger 6 - 10 and 26 - 30
23
In addition, its association with human leukemia interact with RUNX2, zinc finger 24 - 30 interact with EBF-
24
underscores its significance in disease pathology. A deeper 1, 12,13 and N-terminal motif interact with GLI1, GLI, 23,10,14
understanding of the function and regulation of ZNF521/ HDAC3, 9,15,24 NuRD complex, 6,9,12,13,15,25 and GATA-1 13,15,23,25
Zfp521 holds promise for enhancing the diagnosis, (Figure 1 and Table 1). In addition, miR-802 or miR-204-5p
prognosis, and treatment of patients with various has been identified to interact with ZNF521/Zfp521, leading
differentiation/developmental anomaly-related diseases. to the down-regulation of its expression 10,26 (Table 1).

2. Structure and function of ZNF521/Zfp521 2.2. Functions of ZNF521/Zfp521
2.1. Structure of ZNF521/Zfp521 As a transcriptional cofactor, 13,14,27-31 ZNF521/Zfp521 acts as
a zinc finger DNA-binding protein involved in the regulation
The ZNF521 gene is located in the human chromosome of cell differentiation, including hematopoietic, mesenchyme
18q11.2 region and encodes for a nuclear factor comprising stem cells (MSCs), 3,11,32 erythroid lineage, and skeletal
23
1131 amino acids, characterized by 30 Krupp-like zinc finger development. 14,33 It is also involved in neural development
motifs. With a structure akin to ZNF521, Zfp521 serves and differentiation 1,12,15,21,34,35 and has been shown to inhibit
1,2
as an analog. In addition, ZNF521/Zfp521 is an analog adipogenic differentiation 20,22,30,32 (Figure 2).
2-4
of ZNF423/Zfp423 with a similar N-terminal that consists
of NuRD-binding domains (NBDs) for binding the NuRD In human and mouse hematopoiesis, ZNF521/Zfp521
complex 1,3,5-15 (Figure 1). The transcription of ZNF521 is serves as a hematopoietic stem cell (HSC)-enriched
abundant in the brain, especially in the cerebellum. 8,16-18 In transcription factor 29,36 and is involved in the self-renewal
mice, Evi3/Zfp521 is rich in hematopoietic and neural stem and differentiation of fetal hepatic stellate cells. Under
cells, as well as in the precursor cells of cerebellar granule homeostatic conditions, the deletion of Zfp521 does not
neurons and the developing striatum. Furthermore, inhibit adult hematopoiesis. Transcriptionally, Zfp521
19
ZNF521/Zfp521 exhibits high conservation across represses RELA expression by increasing H3K9ac and
species. The homology of mRNA and protein sequence of decreasing H3K9me3 levels in its promoter (Figure 2).
1
ZNF521/Zfp521 among four species is 70.35% and 84.02%, The role of Zfp521 as a key regulator of quiescence and
respectively (Appendix). self-renewal of HSC in adult hematopoiesis is mediated
36

Figure 1. The predicted structure of the ZNF521 protein. The protein is composed of 1311 amino acids, containing 30 Kruppel-like zinc-finger (ZF) motifs,
distributed in 5 – 7 ZF clusters throughout the protein. The N-terminal NBD is a 12-AA motif that interacts with acetylated NuRD, where each ZF cluster
interacts with different proteins.
Abbreviations: NBD: NuRD-binding domains; NLS: Nuclear localization signal domain; NuRD: Nuclear remodeling and histone deacetylation.

Volume 3 Issue 3 (2024) 2 doi: 10.36922/gpd.3260